Perhaps you should try some spelling variations:
tdinh trong » trinh trong, chinh trong, sinh trong
dinh trong » sinh trong, chinh trong, dinh thuong
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap
ho hieu » ho chieu, hoi hieu, nho hieu
tu dung » tuc dung, tu duong, su dung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((tdinh trong) or (dinh trong)) tu dung cong tan ((phan cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((tdinh trong) OR (dinh trong)) tu dung cong tan ((phan cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((tdinh trong) or (dinh trong)) tu dung cong tan ((phan cau) or (phan cac))*.